Every Android run since August failed in :app:buildRustHost: the host
build of pstr-android reaches libdbus-sys through keyring's Secret
Service store, and the runner had no libdbus-1-dev. With no successful
run, nothing was ever cached, so each run rebuilt from nothing.
- libdbus-1-dev in both jobs
- one shared, save-on-failure Rust cache for both jobs
- the staged libmpv tree cached on the build script's hash; the script
stamps its output with the revision and its own hash and skips the
libmpv build when the stamp matches
PLAN.md records the Android parity and UI work that follows.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
